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System for short range transmission of a plurality of signals simultaneously over the air using high frequency carriers

  • US 5,491,839 A
  • Filed: 05/28/1993
  • Issued: 02/13/1996
  • Est. Priority Date: 08/21/1991
  • Status: Expired due to Fees
First Claim
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1. A system for transmitting and receiving plural electrical signals, each of said plural electrical signals representing respective electrical input signals provided from at least respective first and second high fidelity audio sources to said system, said system comprising:

  • (a) transmitter means comprising;

    (1) input means for receiving said plural electrical signals;

    (2) selectable sinusoidal carrier signal producing means for selectably providing at least a first group of sinusoidal carrier signals from plural groups of plural sinusoidal carrier signals, each of said groups comprising at least a first carrier signal and a second carrier signal, said first carrier signal of each of said groups being associated with said first audio source, said second carrier signal of each of said groups being associated with said second audio source, each of said sinusoidal carrier signals of each of said group being preselected and different from the others of said groups and at a frequency of at least 900 MHz, said selectable sinusoidal carrier signal producing means comprising a set of frequency synthesizer means, one respective frequency synthesizer means for each of said electrical input signals, said frequency synthesizer means generating said different sinusoidal carrier signals of said frequency of at least 900 MHz;

    (3) modulating means for modulating each of said carrier signals of said first group with a respective one of said plural electrical signals to produce a plurality of modulated carrier signals;

    (4) combining means for combining said modulated carrier signals into a combined signal;

    (5) antenna means for radiating said combined signal over the air; and

    (b) receiver means for receiving said combined signal.

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